<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    var sum = 0
    for(i=0;i<101;i++){
        // console.log(i);
        sum+=i
    }
    console.log(sum)
</script>   